Don’t make obscene gestures!

Flipping the Bird or making similar gestures will undoubtedly push other drivers into a fit of Rage. Do not provoke other motorists.
You need to use plain old good manners if you want to get along with other drivers on the road. Just because you are cut off from other drivers by walls of steel and glass is no logical reason to treat them any differently than if you were to meet them at a party.
Its true...and you can learn these simple practices by taking a Texas Defensive Driving Course.